不同链长的吡啶基离子液体在盐酸中对N80钢的缓蚀行为  

Corrosion Inhibition Behavior of Different Chain Lengths Pyridine Ionic Liquid for N80 Steel in Hydrochloric Acid Solution

作　　者：薛娟琴[1] 高源[1,2,3] 唐长斌 范磊[2,3] 尹成先 XUE Juan-qin;GAO Yuan;TANG Chang-bin;FAN Lei;YIN Cheng-xian(School of Chemistry and Chemical Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials,Xi’an 710077,China;CNPC Tubular Goods Research Institute,Xi’an 710077,China)

机构地区：[1]西安建筑科技大学化学与化工学院,陕西西安710055 [2]石油管材及装备材料服役行为与结构安全国家重点实验室,陕西西安710077 [3]中国石油集团石油管工程技术研究院,陕西西安710077

出　　处：《材料保护》2021年第6期22-29,共8页Materials Protection

基　　金：陕西省自然科学研究项目(No.2019JLM-43,No.2018ZDXM-GY-171);陕西省教育厅产业化培育项目(No.18JC016)资助。

摘　　要：为获得较咪唑啉类更低浓度、更高效率的离子液体缓蚀剂,通过失重测试、电化学测试、扫描电子显微镜(SEM)和原子力显微镜(AFM)等研究了不同浓度的吡啶基离子液体B4MePyBr、O4MePyBr和硫酸二甲酯吡啶季铵盐缓蚀剂在盐酸中对N80钢的缓蚀行为。失重试验表明,3种缓蚀剂的缓蚀效率均随着添加浓度的增加而增加,25℃下当O4MePyBr添加浓度为10 mmol/L时,缓蚀效率能达到90%以上,且3种缓蚀剂的最大缓蚀效率排序为O4MePyBr>B4MePyBr>硫酸二甲酯吡啶季铵盐;电化学测试表明,3种缓蚀剂均为混合型缓蚀剂;表面形貌测试表明,缓蚀剂能够有效地吸附在碳钢表面,吸附膜层非常紧密;3种缓蚀剂在碳钢表面的吸附均遵循Langmuir吸附等温方程。In order to obtain ionic liquid inhibitors with lower concentration and higher efficiency than idazolines,the corrosion inhibition behaviors of N80 steel in hydrochloric acid solution with different concentrations of Pyridine ionic liquids including B4MePyBr,O4MePyBr and dimethyl sulfate pyridinium quaternary ammonium salt corrosion inhibitor were studied by using weight loss experiments,electrochemical tests,scanning electron microscope(SEM)and atomic force microscope(AFM).The weight loss experiments indicated that the corrosion inhibition efficiency was improved as the concentration of the three kinds of inhibitors increased.Under the conditions of 25℃and 10 mmol/L of O4MePyBr,the corrosion inhibition efficiency could increase to more than 90%,and the maximum efficiency order of them was O4MePyBr>B4MePyBr>dimethyl sulfate pyridine quaternary ammonium salt.Based on electrochemical tests,all of three inhibitors belonged to the mixed-type corrosion inhibitors.From surface morphology analysis,the inhibitor could be effectively adsorbed on the surface of carbon steel,and the adsorption layer was very dense.Besides,the adsorption of three inhibitors the carbon steel surface followed the Langmuir isotherm.

关 键 词：离子液体 缓蚀剂 盐酸 N80钢 

分 类 号：TG174.42[金属学及工艺—金属表面处理]